Electric cartridge fuse holder



0d 24, 1950 w. E. HILL ErAL ELECTRIC CARTRIDGE FUSE HOLDER Original Filed Jan. 24, 1945 'blur/1115 Sq Patented Oct. 24, 1950 ELECTRIC CARTRIDGE FUSE HGLDER Walter Edward Hill, Streetly, and Thomas Daniel Guy Wintle, Walsall, England, assignors to J. A. Crabtree & Co. Ltd., Lincoln Works, Walsall, England, a company of Great Britain Original application January 24, 1945, Serial No.

574,410, now Patent No. 2,427,908, dated September 23, 1947.

Britain July 11, 1944 6 Claims.

This application is a division of our application Serial No. 574,410, filed January 24, 1945, and entitled Electric Fuse Boxes which application, on September 23, 1947, matured into Patent 2,427,908.

This invention relates to improvements in electric fuse holders and rhas for its object to facilitate removal of cartridge fuses from the fuse holding clips of an associated fuse base while ensuring adequate safety when manipulating the fuses into and out of engagement with such fuse holding clips.

According to this invention, the insulating holder for an electric cartridge fuse is composed of two parts each adapted for receiving a portion of an end cap of the fuse and each of which parts is slidably withdrawable in relation to the other part to permit relase of the fuse from the fuse holder.

These parts may be of L-shape, the aligning portions being provided with connecting means, while the parallel portions are adapted for engagement with portions of the end caps of the fuse and are shaped for manipulation in introducing the fuse into, or removing it from, the clips on the associated fuse base. The connecting means may permit the sliding of the parts of the fuse holder relatively to each other when introduclng or withdrawing a fuse while being adapted to prevent detachment of one part from the other. Such means may consist of a blade of hairpin shape and having suflicient resiliency to prevent inadvertent separation of the parts due to vibration. According to an alternative construction the L-shape holder parts may be engaged by a pin and socket coupling permitting the detachment oi' one part from the other.

In order to enable the invention to be readily understood, reference will now be made to the accompanying drawings, illustrating by way of example two constructions for carrying the invention into effect, in which drawing:

Figure 1 is a perspective view of one construction the parts being shown in the separated position.

Figure 2 is a similar view of a modified construction.

Figure 3 is a section on the line III-III of Figure 2, looking in the direction of the arrows.

Figure 4 is a. sectional view of a fuse block with a holder in accordance with Figure l.

Divided and this application May 14, 1947, Serial No. 748,068.

In Great Referring to Figures 1 and 4 of the drawings, a fuse p is mounted in an insulating holder u composed of two parts t, t2 each of L-shape, portions of the end caps of a fuse p being received in recesses t1 of the opposed, spaced and parallel legs, while the opposed end of the aligned parts are adapted for coupling of such parts. Thus one part t may be provided with a pair of pins v for introduction into the socket openings v1l inthe other part t2, thereby enabling the parts to be mated and secured together for relative sliding movement with the fuse trapped in position between them. The configuration or shape of the parts t, t2 is such as to provide an opening along the underside of the fuse holder, which opening exposes the end caps of the fuse positioned within the holder and permits such end caps to be engaged by the fuse clips on the associated fuse base. Identification plates may be mounted in shallow rectangular recesses w on the upper surface of the holder parts. The holder may be manipulated by gripping its ends with nger and thumb, the exposed end caps of the fuse being engageable with the fuse clips L, it being understood that the requisite end pressure exerted on the holder ensures the detention of the fuse therein. A number of holders may serve for covering the open top of the block, Figure 4, which block may be of the construction described and claimed in our application Serial No. 574,410, led January 24, 1945, and entitled Electric Fuse Boxes, which application, on September 23, i947, matured in Patent 2,427,908.

According to the modified construction of fuse holder shown in Figures 2 and 3, the L-shaped parts are engaged by a fiat blade :z: of hair-pin shape adapted to permit the endwise sliding of the parts while preventing their complete separation. The blade possesses resiliency which frictionally holds the parts in the `closed position so as to prevent vibration from causing inadvertent endwise movement of the parts. These parts are slidable on the parallel portions of the blade rr, short outward extensions r1 of which have abutting engagement with the holder parts for limiting their complete separation.

We claim:

l. A holder for an electric cartridge fuse adapted for association with a fuse base having spaced fuse clips thereon, said holder being composed of two parts adapted for relative sliding 3 movement toward and from each other, each of said parts having portions for receiving a portion of an end cap of the fuse, said holder, when the parts thereof are in fuse retaining position, supporting said fuse and having an opening therein exposing the end caps of the fuse for engagement of said caps with the clips on the associated fuse base, said parts being separable by relative sliding movement to permit release of said fuse from said holder; and means for limiting ther sliding movement of said parts to permit release of the fuse from said holder but to resist separation of said parts from eachother.

2. A holder for an electric cartridge fuse adapted for association with` al fuse base having spaced fuse clips thereon, said holder beingco'mposed of two parts adapted for relative sliding `movement toward and fromeachzother, eachv of said parts having portions for receiving a portion of an end cap ofthe fuse, said holder', when the parts thereof are in fuse retaining position, supporting said fuse and having an opening therein exposing the end caps of thefuse' for engagement of said caps with the clips on the associated fuse base, saidv parts beingfseparable by relative sliding movement to permit release of said fuse from said holder; and connectingl means extending between saidl parts and permitting a limited sliding endwise movement of the parts to permit release of the, fuse from the holder, said connecting means frictionally maintaining the parts in their closed fuse retaining position.

3'. A holder for an electric cartridgev fuse adapted'for association with a fuse base having spaced f'use' clips thereon, said holder being composed ofv two L-shaped parts of insulating material adapted for relative sliding movemerlitl` toward andI from eachother, with two of the arms ofV said parts arranged in alinement, and with-the other two arms disposed substantially parallel and normal to said first mentioned arms, the opposed faces of the last mentioned arms of the parts having portions for receiving a portion of the end caps of the fuse, said holder, when the parts thereof are in fuse retaining position, supporting said fuse and having' an opening therein exposing' the end caps of the fuse for engagementof said caps with the' clips on the associated fuse base, said parts being separable by relative sliding movement to permit release of said fuse from said holder; and means on the alined arms for permitting relative sliding movement of the parts but vadapted to resist complete separation thereof',v said means possessing'resiliency for frictionally maintaining the parts in the fuse retaining position to prevent inadvertent displacement thereof due to vibration.

4. In a holder for an electric cartridge fuse in accordance with claim 3, the provision of a blade of hair-pin shape extending between the parts for permitting. the relative. sliding movement of the parts butr resisting. complete separation thereof.

5. A holder for an electric cartridge fuse adapted for association with a fuse base having spaced fuseicli'ps-thereon, said holder being composed ofv two L-shaped parts of insulating material adapted for. relative sliding movement toward! and away from each other with two of the arms of said parts arranged in alinement, and with the other two.v arms disposed substantially parallel an'dnor'm'al to said rst mentioned arms, the` opposed facesof the last mentioned arms ofthe parts having portions for receiving a portio'nof the endcaps of the fuse, said holder, when the parts thereof are in fuse retaining position, supporting said fuse and having an opening therein exposing the end caps of the fuse for engagement of said caps with the clips'V of tlie` as- REFERENCES yCITEDl Y The following'i referencesA are of record in the' file of this patent: Y UNITED STATES PATENTS Numberl Name Date"- 1,404,324v Rohn v Jan. 24', 1922 1,552,971 Unger r sept. s, 1925 l,673 ",6'170 Weizsaeker June I2, I928 2,117,346 Millis May 1:77, 1938 FOREIGN `r'-ATI`IE11'\TTS"Y Number I Country Date 553,054 Greal Britain lVIay' 5,` 1943 554,578` Great Britain'. July 9, 1943 

